Chances are slim you’ll end up trapped in a sinking car, but let’s say you were. Would you know what to do when the door doesn’t open? How to break through a window? Canadian TV host Rick Mercer finds out.

The six-minute video above details a few of the most important things you might need to know if you ever need to find your way out of a submerged car. For starters, the doors won’t open. Manual windows are easy enough to open, but if you’ve got electric windows, they’ll be out of commission unless you thought really fast; you’ll need a way to break them. If you were prepared, you might have a center punch on-hand (see one in action around the 2:30 mark); if not, kicking near the front/hinge of the window is your best bet at breaking the glass.

Check out the full (and entertaining) video for more details and demonstrations. It’s information you’re not likely to use in your life, but, as with most survivalist endeavors... the more you know! Thanks Khalil!

UPDATE: As several commenters have pointed out, the guys at Mythbusters took on escaping from a sinking car a while back, and have a few methods of their own.